Rotary drier.



F. RFWILLSON, JR.

ROTARY DRIER.

APPLIOATION FILED SEPT 19, 1903.

951,977a Pa ented Mar. 15, 1910.

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F. R. WILLSON, JR.

ROTARY DRIER.

APPLICATION FILED SEPT. 19, 1903.

Patented Mar. 15,1910.

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FREEMAN R. WILLSON, JR., OF WORTHINGTON, OHIO, ASSIGNOR T0 JEFFREYMANIL- FACTURING COMPANY, OF COLUMBUS, OHIO, A CORPORATION OF OHIO.

ROTARY DRIER.

Application filed September 19, 1903.

To all whom it may concern:

Be it known that I, FREEMAN R. WILLsoN, J12, a citizen of the UnitedStates, residing at ort-hington, in the county of Franklin and State ofOhio, have invented certain new and useful Improvements in RotaryDrier-s, of which the following is a specification, reference being hadtherein to the accmnpanying drawing.

This invention relates to improvements in rotary driers.

It has for its object to provide a drier of very simple construction inwhich the heat.- ed products of combustion from the furnace do not comeinto contact with the material to be dried.

Another object is to provide means Whereby the said heated products ofcombustion may be distributed at will over the drying cylinder.

Figure 1 is a side elevation of a drier embodying my invention. Fig. 2is an end elevation of the same looking from the left in Fig. 1. Fig. 3is an end elevation looking from other end of the mechanism.

In the drawings, A represents the drying cylinder, B the housing orcasing incasing said cylinder, C the driving mechanism for thecylinder, 1) the furnace, and E the suction. The housing B is preferablyof brick having the vertical side walls 1 and 2 surmounted by the archedtop wall 3. The furnace is arranged at the front end of said housing. Itmay be constructed in any well known manner, but I prefer to have theentire grate surface 1 outside of the front end wall 5 of the housingwhich incases the cylinder A.

(3 is an arch or fire wall preferably of brick, arranged above the gratesurface and extending back into the chamber within the housing for aconsiderable distance and adapted to conduct the heated products fromthe grate to the end of the cylinder. 7 and 8 are openings in the saidarch 6 arranged underneath the cylinder A. They are preferably providedwith metal ducts or port holes 8 in which are mounted the valves ordampers 9. The latter are provided with operating handles 10 extendingthrough the housing so that the dampers may be adjusted from theexterior of the drier. Peep holes 10 are arranged along the same side ofthe housing as the handles 10 to enable the operator to determine how toregulate Specification of Letters Patent.

Patented Mar. 15, 1910.

Serial No. 173,840.

the said valves or dampers. The drying cylinder or drum A is preferablyformed of steel plates.

1111 and 1212 are spiders arranged respectively at opposite ends of saidcylinder or drum and adapted to support the shell and provide suitablesupporting surfaces for the short or stub shafts 13 and 14: at theopposite ends of the cylinder, respectively. It will be seen that byarranging the spiders at some little distance apart, as shown in thedrawings, a wide supporting surface is provided for said short shaftsand that this is accomplished without using up much of the interiorspace within the cylinder. This arrangement of the spiders also providesthat the strains on the opposite ends of the cylinder will bedistributed over a broad area so that the cylinder shell will not besubjected at the points of support to excessive bending or shearingstrains.

15 is a bearing for the shaft 13 arranged on the framework at the frontend of the drier. The short shaft 14: at the other end of the cylinderis mounted in the thrust bearing 15 supported by the standard 15.Preferably, the bearing 15 is secured in planes below those in which thebearing 15 is secured so that the cylinder A inclines to the horizontalto facilitate in the passage of the material to be dried from itsreceiving point to its delivery point.

16 is a spur gear rigidly secured to the shaft 13 and adapted to meshwith the driving pinion 17 rigidly secured on the countershaft 18supported in bearings 19 and 20 on the said framework. The bevel wheel21 rigidly secured to the said shaft 20 meshes with the bevel pinion 22rigidly secured on the transversely mounted shaft 23.

24c and 25 are driving pulleys rigidly secured to the shaft 23. Theformer may be belted to any suitable source of power and the latter isconnected by the belt 26 to the pulley 27 on the fan shaft 28. Thesuction fan E may be secured in place above the drier in any suitablemanner.

29 is an exhaust pipe or duct leading to the fan which communicates withthe cylinder A at its front end. Preferably, this exhaust duct 29 isexpanded at its intake end 30 so as to inclose the front end of the saidcylinder. The exhaust duct or pipe 31 leading from the fan communicateswith the smoke stack 32 which is secured in place on the housing B andcommunicates with the. chamber therein. Preferably, this exhaust duct 31is bent upwardly as at 33 and communicates with the said smoke stack ata point 34 considerably above the top of the drier casing.

35 is a dust collector arranged at the lower end of the vertical leg ofthe exhaust pipe 31. This dust collector has a cone-shaped hopper 36provided with an escape valve 37 to permit the withdrawal of the dusttherefrom.

38 are lifting plates arranged longitudinally of the cylinder and on theinside thereof.

39 is a feed hopper arranged at the front end of the drying cylinder,and 40 is a receiving hopper arranged at the delivery end thereof andhaving the outlet spout 41.

The smoke stack 32 is preferably provided with a damper or cut-off valve42 and the exhaust duct 29 with the damper or valve 43, the former ofwhich serves to control the furnace draft and the latter the vaporsuction through the cylinder. These valves are within convenient controlof the operator.

With a drier of my improved construction there is no possibility of thegases, fumes and smoke from the furnace coming in contact with thematerials to be dried and discoloring or otherwise afiecting them.Therefore, cheaper grades of fuel may be used. The provision of meansfor regulating the distribution of the hot gases or products ofcombustion over the cylinder surface is of great importance. By thisarrangement, the operator is able to regulate the distribution of theheat according to the material to be drier.

The dust collector arranged in the air exhaust system provides theoperator with a simple means for determining the amount of materialbeing carried off in the form of dust and thereby enables him toregulate the valve e3 so as to provide against loss of material orineificiency of the drier in this particular. Furthermore, by connectingthe exhaust duct from the fan to the smoke stack, the blast from theformer serves the purpose of a forced blast for the latter.

WV hat I claim is:

1. In a drier, the combination of the heating chamber, the smokestackcommunicating with said chamber, a rotary cylinder ex tending throughsaid chamber, an exhaust duct leading from the receiving end of saidcylinder and communicating 'with the smoke-stack, a fan in said exhaustduct, and a dust collector in said exhaust duct between said fan andsaid smoke-stack.

2. In a drier, the combination with the drying chamber, the exhaust ductcommunicating therewith, the fan in said duct, the dust collectorarranged in connection with said exhaust duct, and a regulating valve insaid duct for controlling the suction effect a of the fan, substantiallyas set forth.

3. In a drier, the combination with the drying chamber, the exhaust ductcommunicating therewith, the exhausting means in said duct, the meansarranged in connection with the said exhaust duct for indicating thepassage of dust therethrough, and a regulating valve in said duct forcontrolling the suction effect of the exhausting means, substantially asset forth.

In testimony whereof I aflix my signature in presence of two witnesses.

FREEMAN R. WILLSON, JR.

Witnesses:

Jon T. WEBSTER, GEO. H. ANDERSON.

